Apparatus for tempering flat glass



May 11, 19 13. GQW. T. BIRD V V y 2,318,584

APPARATUS FOR TEMPERING FLAT GLASS Filed March 6, 1940 s Shevet s-Sheet 1 29 r 23 L g Q 10 J; l i 2 2 12- A E y 94 G. w. T. BIRD 2,318,584

APPARATUS FOR TEMPERING FLAT GLASS Filed March 6, 1940 :s Sheets-Sheet 3 Patented May 1 1, 1943 7 APPARATUS FOR TEMPERING FLAT: GLASS ks George William Terence Bird, Prescot, England, assignor to The American Securit Company, Wilmington, Del., a company of Delaware Application March 6, 1940, Serial Nb. 322,598 In Great, Britain March 7, 1939 6 Claims.

This invention relates to the cooling of flat glass for tempering it by means of jets of cooling medium, and has for its object an' improved means for steadying the glass during the operation of cooling.

When a sheet of glass is cooled by jets of cooling medium directed against its two surfaces, it is liable to be oscillated in directions perpendicularto its plane and to suffer damage or deformation or uneven cooling thereby. Devices for holding the sheet stationary which come into contact with itat its edges, or which remain stationary shown are designed for apparatusin which the,

glass is introduced between the frames from below They are mounted on anoscil relatively to the glass, have-been found harmful V in causing uneven cooling.

" The invention is applicable to' the type'of cooling apparatus in which the jets of cooling medium issue from a pair of jet frames which are oscillated relatively to the glass during the cooling operation in the customary way.

According to the invention, each of a pair of frames. oscillating with the jet frames, carries a plurality of pegs, and means are provided for moving the two sets of pegs towards each other;

relatively to the jet frames, to positions in which the pegs of each set are close to but normally out of contact with the glass. The glass, therefore,

= is not held by the pegs, but its movement is In the accompanying drawings, which show by way of example an apparatus for carrying out the inventionr r Figure l is a side view-of a pair of jet frames with frame for pegs, parts being broken away;

Figure 2- is asection along the line A-A of i v Figure 1;

Figure 3 is a section through an alternative form of peg and guide on an enlarged scale;

Figures 4 and 5 are views similar to those of Figures 1 and 2 showing an alternative form of v the device; v

Figure dis a view similar to that of Figure 5 showing an alternative device, and

Figure 7 is a diagrammatic side view showing the jet frames (omitting the steadying devices) connected with oscillating means.

Referring to the drawings, each jet frame consists of two vertical pipes i, supplied with cooling medium by the pipes 2; between the pipes I extend cooling medium against the glass 1, Theglass is not shown in Figure 1, and-the tubes-lam broken,

away for the sake of clearness. The jet frames or from above. lating apparatus which is a known deviceghere inafter briefly described with ure'7ofthe drawings. a

Frames for carrying the pegs are constructed and attached to the Jet frames as follows; transverse angle irons 5 are attached to the upper and lower ends of the tubes I by clips '8; Vertical T-irons I re fixed to the angle irons 5 and carry angle iro 8. Guides 9 are welded at intervals to the angle irons 8, and pegs iii are adapted to slide in the guides 9. The'pegs carry tips ll of material such as hard wood or the material known under the trade mark Bakelite, suitable for occasional contact with hot glass. At their other ends,'the pegs iii are pivoted at i5"to arm's I! fixed to transverse shafts If by set-screws H.-

The arms I! are slotted at the pivots i5 tdpermit the necessary movement and the horizontal flanges of the angle irons 8 are cut away to permit the'arms i2 to take up the positions shown. The shafts i3 are supported in bearlng'blocks l6 fixed to the T-irons 1. "Each shaft l3 carries near its right hand end an arm I! (shown in dotted lines in Figure 2) and all the arms IT on each frame are'coupled together by a bar it. .A handle I9 is fixed to one ,of the shafts IS (the top shaft at the right in Figure l) and, by turning this shaft by the handle counter-clockwise as seen on the left hand side of Figure" 2, all the shafts I3 on this side are turned simultaneously so as to slide theipegs Into the left intheiriguides 8, till their tips are nearly flush with the inner sides of the tubes 3. A handle ll'may be provided for the shafts IS on the other frame, or the twoshafts, one as each frame, may be connected by the two arms 20 and 2| respectively, which are joined by a link 22 (shown in dotted lines in Figure 2). In this latter case, all the pegs In on the two frames can be withdrawn. from the position;

glass by turning the single handle [9. In order that the pegs may be moved shown, away from the towards the glass to predetermined positions in tact with the glass, the shaft I3 carryingthe which they are close to, but normally out of conhandle is is provided with an arm 23 having an Y adjustable stop 24 (Figural) adapted to bear: against the angle iron 8, when the pegs are in the jet tubes 3 provided with jet holes to direct the 55 predetermined positions.

The pegs in can be reference," to Fisrl adjusted individually by means of the arms I! and set screws 14.

In operation,before the glass is introduced -be-' tween the jet frames, the pegs are withdrawn, so as to leave the space between the two sets of tubes 3 clearfor introducing the glass with its tongs or other carrying'means. Immediately the glass is inrposition, the handle or handles I9 is or are turned to bring the pegs into the posi- .tion shown. The cooling medium is then supplied and the Jet and peg frames are oscillated.

The glass is then restricted in any oscillations to and fro past an edge of the glasssheet. In I this case it may arise that pegs so placed strike the edge of the glass sheet,'if the sheet is canted.

at the moment when the pegs are about to pass its edge. Pegs in positions where this-mayfarise are therefore preferably'made of the formshown in Figure 3, so that f they may be withdrawn individually from the sheet by a movement which is supplementary to the movement'imparted by the handle l9. Figure 3 shows on an enlarged scale a short length of angle iron i, with a. guide 9 flxedthereto. The peg consists of a rod. 25, with a portion 26 of reduceddiameter carrying the tip H. The rod is adapted to slide in a sleeve 21, which in turn is adapted to slide in the 'guide .9. A spring 28 inthe sleeve 21 and surrounding the portion "'tends to press the rod 2i so as'to withdraw the peg from the glass. The rod 28 is held in the position shown by a pin 29 to the rod and engaging a bayonet slot 30 in the sleeve 21. -,By a slight turn of the knob 3! on the rod 2!, the D68 is withdrawn from the glass by the spring 28, this movement being relative to the sleeve '21. The sleeve 2! carriesa head 32 having two holes 33. and these holes are engaged by pins on the forked end of a lever l2. The peg, therefore, partakes of the'moveme'nt imparted'to all the pegs by turning the handle it, but can bemaintained always in a position well clear of the glass by allowing the rod 25 to slide outwards relatively to the sleeve; j a Y 7. As an alternative to the pegs shown in Figure 3, the form of device shown in Figures 4 and5 may be used. In this the pegs are adjustable in position horizontally, so that they'may bemoved to a position to suit any size of glass sheet. The peg guides 9 'are'carried on two rods -34 held in blocks 35 fixed to' 'the T-irons I. The guides'are adapted to'slide along the rods 34 and to be fixed in any desired position. between T-irons I by the set-screws 36. Two arms 37 are fixed to the shaft i3 at opposite sides of'the frame by set screws l4, and'carry between them a rod 38. -The rod." engages the slotted ends 39 of all the pegs in a horizontal row,'s0 that'by turning the shafts l3, all the pegs may be moved into operative or inoperative position, whatever their positions; I a 1 Alternatively, as shown in Figure 6, the guides 78' may bedispensed with by mounting the pegs l0 directly on blocks 40 keyed to the shafts l3 sothat, on turning the shafts 13, the pegs may be moved into theinoperative position shown in dotted lines. The pegs may be adjusted in pos1-" tion lengthways of the shafts by sliding them along the shafts.

Figure '7 shows diagrammatically a pair of jet frames with oscillating means. and a sheet of glass about to be raised between the frames. The pipes 2. are connected through pipes 4| to elbow pieces 42 to which cooling medium is supplied by 1. Apparatusfor cooling a sheet of glass for tempering, it, comprising two coolingmedium supply frames on opposite sides of the sheet of glass, each provided with jet holes adapted to direct cooling medium against the surfaces of the sheet, means for oscillating the'two frames relatively to the sheet of; glass, tworoscillatable peg frames, one at each side-of the sheet, connected respectively with the two supply frames, a plurality of 'pegs .mounted on each peg frame having ends of small cross-section, means for simultaneously moving all the pegs of each frameto wards, and away from an operative position in whichtheir tips are close to but out of contact with the glass sheet, and means adaptedto displace individually atleast one. of the pegs in a direction at right-angles to the plane of the glass tooccu'py an inoperative positionwhen the remaining pegs arein operative positions.

2. Apparatus for cooling a sheet of glass-for tempering it, comprising two cooling medium supply frames on opposite sides of the sheet of glass, ea'chprovided with jet holes adapted to direct cooling medium against. the surfaces of the sheet, means for oscillating the two frames relatively to the sheet of glass, two oscillatable peg frames, one at each side of the sheet, connected respectively with theitwo supply frames, a plu rality of pegs mounted oneach peg frame having endsof small cross-section, means for adjustin the pegs in a. direction parallel to the plane of the glass, means for simultaneously moving all the pegs of each frame towards and away from an operative position in' which their tipsare close to but out of contact with the glass-sheet, and means adapted to displace individually at least one of the pegs in a direction at right-angles to the plane of the glass to occupy an inoperative position when the remaining pegs are in operative positions.

3. Apparatus for cooling 2. sheet of glass for tempering it, comprising two'cooling medium supply'frames, in flxed'spaced relationship on oppo site sides of the sheet of glass, each prcvidedwith jet holes adapted .to direct cooling medium against the surfaces of the sheet, means for oscillating the two frames relatively to the sheet of glass, two peg frames, connected respectively with the two supply frames, so as' to oscillate with therr, a plurality of pegs mounted on each peg framehaving ends of small cross-section with a capacity for movement relatively to the connected supply frame froma position in which their tips are substantiallyin the plane of the jet holes into a position in ,whichtheiltips are close to but out of contact with the glass sheet. means connecting all the pegs of at least one peg frame adapted to effect the said movement of all the pegs on said last-mentioned frame simultaneously, and means for independently adjusting the position of the last-mentioned individual pegs relative to the plane of the jet holes.

4. Apparatus for cooling a sheet of glass for tempering it, comprising two cooling medium supply frames in fixed spaced relationship'on opposite sides of the sheet of glass, each provided with jet holes adapted to direct cooling medium against the surfaces of the sheet, means for oscillating the two frames relatively to the sheet of glass, two peg frames connected respectively with the two supply frames, so as to oscillate with them, a plurality of pegs mounted on each peg frame having ends of small cross-section with a capacity for movement relatively to the connected supply frame from a position in which their tips are substantially in the plane of the jet holes V into a position in which their tips are close to but out of contact with the glass sheet, and means connecting all the pegs of both peg frames adapted to effect the said movement of all the pegs simultaneously.

5. Apparatus for cooling 8. sheet of glass for tempering it, comprising two cooling medium supply frames, in fixed spaced relationship on opposite sides of the sheet of glass, each provided with jet holes adapted to direct cooling medium against the surface of the sheet, means for oscillating the two frames relatively to the sheet of glass, two peg frames connected respectively with the two supply frames, so as to oscillate with them, a plurality of pegs mounted on each peg frame having ends of small cross-section with a capacity for movement relatively to the connected supply frame from an inoperative position in which their tips are substantially in the plane of the jet holes into an operative position in which their tips are close to but out of contact with the glass sheet, means connecting all the pegs of each peg frame adapted to effect the said'movement of all the pegs on the frame simultaneously,

and means adapted to displace individually at least one of the pegs in a direction at rightangles to the plane of the glass to occupy an inoperative position when the remaining pegs are in operative positions.

6. Apparatus for cooling a sheet of glass for tempering it, comprising two cooling medium supply frames, in fixed spaced relationship on opposite sides of the sheet of glass, each provided with jet holes adapted to direct cooling medium against the surfaces of the sheet, means for oscillating the two frames relatively to the sheet of glass, two peg frames, connected respectively with me two supply frames, so as to oscillate with them, a plurality of pegs mounted on each peg frame having ends of small cross-section with a capacity for movement relatively to the connected supply frame from a position in which their tips are substantially in the plane of the Jet holes into a position in which their tips are close to but out of contact with the glass sheet, means connecting all the pegs of at least one peg frame adapted to effect simultaneously the said movement of all the pegs on said last-mentioned frame in a direction perpendicular to the plane of the sheet of glass, means for independently adjusting the position of the last-mentioned individual pegs relative to the plane of the jet holes, and additional means for adjusting the pegs on said last-mentioned frame in a direction parallel to the plane of the lass.

GEORGE WILLIAM TERENCE BIRD.- 

